Consider the market for tea. Which of the following scenarios would definitely result in an increase in the price of tea?

a. A new study is published explaining the benefits of tea, and at the same time a new technology allowing for more efficient tea farming is discovered.

b. The price of coffee falls, and at the same time a new technology allowing for more efficient tea farming is discovered.

c. Consumers expect the price of tea to fall in the future, and at the same time a fire wipes out a significant portion of tea farms.

d. The price of coffee falls, and at the same time the cost of labor to farm tea decreases.

e. A new study is published explaining the benefits of tea, and at the same time a fire wipes out a significant portion of tea farms.

Which is the correct answer?